A study on burning behavior and convective flows in Methanol pool fires bound by ice

Hamed Farmahini Farahani, Grunde Jomaas, Ali S. Rangwala

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Abstract

An experimental study on methanol pool fires bound by ice was carried to research the burning behavior and flow field (within the liquid-phase) of methanol. The experiments were conducted in two parts: 1- in a cylindrical ice cavity/pan (10.2 cm diameter and 6 cm depth) at three different conditions to analyze burning parameters of methanol, 2- in a square glass tray with outside dimensions of 10 × 10 cm and a depth of 5 cm to obtain flow field of methanol pool with a two-dimensional PIV (Particle Image Velocimetry) system. The results of the experiments of the first part show the cold boundaries of the ice cavity/pan act as a heat sink causing considerable heat losses. Thus, burning rates and burning efficiencies are found to be lower with cold boundaries. However, the burning rate values in ice cavity are found to be the highest because of the melting of the ice and expansion of the cavity. The analysis of the results obtained by the PIV system showed the velocity magnitudes and flow patterns in the liquid-phase of icy methanol fire significantly change over the course of burning. In the instants after ignition a horizontal flow induced by Marangoni near the surface was observed. Later on, mixing of melt-water with methanol and sinking of this mixture caused a cycle in the tray that resulted in a vortex appearing in the middle of the pool. Magnitudes of velocity were also observed to increase after ignition. The increase in the velocity magnitudes is expected to significantly impact the melting and size of the lateral cavity.
Original languageEnglish
Title of host publication2017 International Oil Spill Conference Proceedings
Number of pages16
Volume2017
Publication date2017
Pages1983-1998
DOIs
Publication statusPublished - 2017
EventInternational Oil Spill Conference 2017 - Long Beach, United States
Duration: 15 May 201718 May 2017

Conference

ConferenceInternational Oil Spill Conference 2017
CountryUnited States
CityLong Beach
Period15/05/201718/05/2017
SeriesInternational Oil Spill Conference Proceedings
Number1
Volume2017
ISSN2169-3358

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